3.4 KiB
;; Scheduling description for z900 (cpu 2064). ;; Copyright (C) 2003 Free Software Foundation, Inc. ;; Contributed by Hartmut Penner (hpenner@de.ibm.com) and ;; Ulrich Weigand (uweigand@de.ibm.com).
;; This file is part of GCC.
;; GCC is free software; you can redistribute it and/or modify it under ;; the terms of the GNU General Public License as published by the Free ;; Software Foundation; either version 2, or (at your option) any later ;; version.
;; GCC is distributed in the hope that it will be useful, but WITHOUT ANY ;; WARRANTY; without even the implied warranty of MERCHANTABILITY or ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ;; for more details.
;; You should have received a copy of the GNU General Public License ;; along with GCC; see the file COPYING. If not, write to the Free ;; Software Foundation, 59 Temple Place - Suite 330, Boston, MA ;; 02111-1307, USA.
;;
;; References:
;; The microarchitecture of the IBM eServer z900 processor.
;; E.M. Schwarz et al.
;; IBM Journal of Research and Development Vol. 46 No 4/5, 2002.
;;
;; z900 (cpu 2064) pipeline
;;
;; dec
;; --> | <---
;; LA bypass | agen |
;; | | |
;; --- c1 | Load bypass
;; | |
;; c2----
;; |
;; e1
;; |
;; wr
(define_automaton "z_ipu") (define_cpu_unit "z_e1" "z_ipu") (define_cpu_unit "z_wr" "z_ipu")
(define_insn_reservation "z_la" 1 (and (eq_attr "cpu" "z900") (eq_attr "type" "la")) "z_e1,z_wr")
(define_insn_reservation "z_larl" 1 (and (eq_attr "cpu" "z900") (eq_attr "type" "larl")) "z_e1,z_wr")
(define_insn_reservation "z_load" 1 (and (eq_attr "cpu" "z900") (eq_attr "type" "load")) "z_e1,z_wr")
(define_insn_reservation "z_store" 1 (and (eq_attr "cpu" "z900") (eq_attr "type" "store")) "z_e1,z_wr")
(define_insn_reservation "z_call" 5 (and (eq_attr "cpu" "z900") (eq_attr "type" "jsr")) "z_e1*5,z_wr")
(define_insn_reservation "z_o2" 2 (and (eq_attr "cpu" "z900") (eq_attr "type" "o2")) "z_e1*2,z_wr")
(define_insn_reservation "z_o3" 3 (and (eq_attr "cpu" "z900") (eq_attr "type" "o3")) "z_e1*3,z_wr")
; ; Insn still not mentioned are check for ; the usage of the agen unit ;
(define_insn_reservation "z_int" 1 (and (eq_attr "cpu" "z900") (eq_attr "atype" "reg")) "z_e1,z_wr")
(define_insn_reservation "z_agen" 1 (and (eq_attr "cpu" "z900") (eq_attr "atype" "agen")) "z_e1,z_wr")
;; ;; s390_agen_dep_p returns 1, if a register is set in the ;; first insn and used in the dependent insn to form a address. ;;
;; ;; If an instruction uses a register to address memory, it needs ;; to be set 5 cycles in advance. ;;
(define_bypass 5 "z_int,z_agen" "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")
;; ;; A load type instruction uses a bypass to feed the result back ;; to the address generation pipeline stage. ;;
(define_bypass 3 "z_load"
"z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")
;; ;; A load address type instruction uses a bypass to feed the ;; result back to the address generation pipeline stage. ;;
(define_bypass 2 "z_larl,z_la" "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")